To install:

1. Download the plugin file
2. Unzip the file into a folder on your hard drive
3. Upload /add-new-users/ folder to /wp-content/plugins/ folder on your site
4. Login to your admin panel for WordPress or Multisite and activate the plugin:

Note: If you have an older version of the plugin installed in /mu-plugins/ please delete it.

That’s it! No configuration necessary!

To use:

A new menu item called Add New Users should appear under the Users navigation menu. It is designed for quickly creating and adding new users to a site in batches of up to 15 users.

Please note:

The users are immediately added to the site and automatically listed as users on theUsers page.

They can only access features in the site’s administration panel based on the role they’ve been assigned

Spam filters, especially strict ones for institutional email addresses, often block the emails that the login details. If unsure
use free webmail accounts such as gmail, hotmail that don’t block these invitation emails.

Use only lowercase letters and numbers, with no spaces, in the username

The username is what they use to sign into the dashboard and is displayed on posts and comments they write. You can’t change a username, however you can change what name is displayed.

It won’t allow you to create several usernames with the same email address because the system resets password based on email address. But you can trick it using the gmail+ method

To add the new users, blog administrators simply enter:

The username they would like to give them

Their email address

A password for the user (if they want otherwise a random password will be automatically generated)